<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <style>
    
  </style>
</head>
<body>
  
</body>
<script>

  console.log("hello");
  console.log(typeof "hello");
  console.log( "365" );
  console.log( "true" );
  console.log( "{}" );
  console.log( "function(){}" );

  console.log("------");
  
  console.log( typeof null );
  console.log( null );
  console.log( typeof undefined );
  console.log( undefined );
  console.log( typeof NaN );
  console.log( NaN );
  console.log( typeof function(){} );
  console.log( function(){} );
  console.log( typeof {} );
  console.log( typeof [] );
  console.log( {} );
  console.log( [] );
  console.log( typeof true );
  console.log( true );

  
</script>
</html>